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Mike G.
Mike G., Master Electrician
Category: Electrical
Satisfied Customers: 7164
Experience:  Proven Professional 48 years Experience
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I am working on a 240 volt infrared heater that is 3000

Customer Question

I am working on a 240 volt infrared heater that is 3000 watts. It was installed by someone else that was not an Electrician. They used nm flexible conduit 12 guage wire from a two pole 20 amp breaker to the rheostat to the heater. The rheostat/control switch burned up wires got hot and the insulation failed. Should this circuit be on a 30 amp two pole breaker with 10 guage wire. I plan to re do this in EMT. Thanks Chris
Submitted: 11 months ago.
Category: Electrical
Expert:  Mike G. replied 11 months ago.

Hi, I'm Mike G and I'll be assisting you. From your description and question I would check the rating of the switch. A spec grade 20A switch should have been used.

Customer: replied 11 months ago.
OK it looks like the heater came with a 15A 240v rheostat. My brother in law got a new one and is still only a 15 amp. Why did they sell a 15 amp switch for a 3000 watt heater!?
Expert:  Mike G. replied 11 months ago.

Why? Can only guess that they don't know what it should be.

Customer: replied 11 months ago.
OK thanks for the help I should have checked the swich.
Expert:  Mike G. replied 11 months ago.

Very good, you're welcome.

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